cmake_minimum_required(VERSION 3.5)

PROJECT(grpc_test_client LANGUAGES CXX)

SET(CMAKE_CXX_STANDARD 11)
SET(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Threads REQUIRED)

##################Add libraries################
  set(Protobuf_DIR ./grpc/lib/cmake/protobuf)
  set(protobuf_MODULE_COMPATIBLE TRUE)
  find_package(Protobuf CONFIG REQUIRED)

  message(STATUS "Using protobuf ${protobuf_VERSION}")

  set(_PROTOBUF_LIBPROTOBUF protobuf::libprotobuf)
  set(_REFLECTION gRPC::grpc++_reflection)
  if(CMAKE_CROSSCOMPILING)
    find_program(_PROTOBUF_PROTOC protoc)
  else()
    set(_PROTOBUF_PROTOC $<TARGET_FILE:protobuf::protoc>)
  endif()

  # Find gRPC installation
  # Looks for gRPCConfig.cmake file installed by gRPC's cmake installation.
  set(gRPC_DIR ./grpc/lib/cmake/grpc)

  find_package(gRPC CONFIG REQUIRED)
  message(STATUS "Using gRPC ${gRPC_VERSION}")

  include_directories(${gRPC_INCLUDE_DIRS})

  set(_GRPC_GRPCPP gRPC::grpc++)
  if(CMAKE_CROSSCOMPILING)
    find_program(_GRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin)
  else()
    set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:gRPC::grpc_cpp_plugin>)
  endif()
###############################################

# Proto file
get_filename_component(hw_proto "./calculator.proto" ABSOLUTE)
get_filename_component(hw_proto_path "${hw_proto}" PATH)

# Generated sources
set(hw_proto_srcs "${CMAKE_CURRENT_BINARY_DIR}/calculator.pb.cc")
set(hw_proto_hdrs "${CMAKE_CURRENT_BINARY_DIR}/calculator.pb.h")
set(hw_grpc_srcs "${CMAKE_CURRENT_BINARY_DIR}/calculator.grpc.pb.cc")
set(hw_grpc_hdrs "${CMAKE_CURRENT_BINARY_DIR}/calculator.grpc.pb.h")
add_custom_command(
      OUTPUT "${hw_proto_srcs}" "${hw_proto_hdrs}" "${hw_grpc_srcs}" "${hw_grpc_hdrs}"
      COMMAND ${_PROTOBUF_PROTOC}
      ARGS --grpc_out "${CMAKE_CURRENT_BINARY_DIR}"
        --cpp_out "${CMAKE_CURRENT_BINARY_DIR}"
        -I "${hw_proto_path}"
        --plugin=protoc-gen-grpc="${_GRPC_CPP_PLUGIN_EXECUTABLE}"
        "${hw_proto}"
      DEPENDS "${hw_proto}")

# Include generated *.pb.h files
include_directories("${CMAKE_CURRENT_BINARY_DIR}")

foreach(_target main)
  add_executable(${_target} "${_target}.cpp"
    ${hw_proto_srcs}
    ${hw_grpc_srcs})
  target_link_libraries(${_target}
    ${_REFLECTION}
    ${_GRPC_GRPCPP}
    ${_PROTOBUF_LIBPROTOBUF})
endforeach()

#AUX_SOURCE_DIRECTORY(. DIR_SRC)

#add_executable(${PROJECT_NAME} ${DIR_SRC})

